The convert command can convert certain types of expressions expr to a DataFrame, and can convert a DataFrame df to certain other types typ.

The convert( expr, DataFrame ) form of the command converts an expression expr, which must be a Matrix, or two-dimensional Array, to a DataFrame object.

A DataFrame df can be converted to a set, Array, Vector or Matrix, nested list of lists, or table.

To convert a DataFrame df to a nested list of lists, use the form convert( df, 'list', 'nested' ).

$\mathrm{df}≔\mathrm{convert}\left(⟨⟨⟨1\left|2\right|3⟩\,⟨4\left|5\right|6⟩⟩⟩\,\mathrm{DataFrame}\right)$

$\mathrm{df}≔\left[\begin{array}{cccc}& 1& 2& 3\\ 1& 1& 2& 3\\ 2& 4& 5& 6\end{array}\right]$

$\mathrm{convert}\left(\mathrm{df}\,'\mathrm{list}'\,'\mathrm{nested}'\right)$

$\left[\left[1\,4\right]\,\left[2\,5\right]\,\left[3\,6\right]\right]$

$\mathrm{convert}\left(\mathrm{df}\,'\mathrm{table}'\right)$

$table\left(\left[\left(1\,2\right)=2\,\left(2\,3\right)=6\,\left(1\,1\right)=1\,\left(1\,3\right)=3\,\left(2\,1\right)=4\,\left(2\,2\right)=5\right]\right)$

$\mathrm{convert}\left(\mathrm{df}\,'\mathrm{Matrix}'\right)$

$\left[\begin{array}{ccc}1& 2& 3\\ 4& 5& 6\end{array}\right]$

The DataFrame/convert command was introduced in Maple 2016.

For more information on Maple 2016 changes, see Updates in Maple 2016.